Archive for September, 2014

“Jesuit Day” Chez Renaissance Mathematicus

 

Utagawa_Kuniyoshi,_Portrait_of_Chicasei_Goyô_(Wu_Yong)_(1827–1830)

“1675 image of a Chinese astronomer with an elaborate armillary sphere. In the 17th century, Chinese astronomers collaborated extensively with Jesuit scholars, who brought the Copernican and Tychonic systems from Europe.”

Thony Christie, The Renaissance Mathematicus, posts about the role of Jesuit scientists in the early modern period.

Since this blog started I have attempted to draw my readers attention to those contributions by profiling individual Jesuits and their contributions and also on occasions defending them against their largely ignorant critics. I have decided to use this anniversary to feature those posts once again for those who came later to this blog and might not have discovered them yet.

2 comments September 28th, 2014

Faceless

faceless sphinx

Google Street View tries to protect the privacy of the people it photographs by automatically detecting the presence of the human face and suitably pixellating it. Making an interesting theological statement, Google doesn’t distinguish between the human and the divine: Marion Balac has a page full of faceless gods.

Add comment September 27th, 2014

Fatigue Explained?

fatigue

fatigue in the brain?

In yet another fascinating article Cort Johnson explores the work of Japanese scientists into the way fatigue is produced in the brain and the body.

Thus, there are two parts to centrally produced fatigue. There is the facilitation process that allows us to activate the motor cortex and recruit more muscles in the face of fatigue, and there is the inhibition system that stops the facilitation system in its tracks. The second of these is in control in ME/CFS.

They forward the hypothesis that damage to the prefrontal cortex is a causative factor in the abnormal fatigue of people with ME.

The Japanese researchers zeroed in on the dorsolateral prefrontal cortex (DLPFC), a part of the brain that regulates of a variety of functions often impaired in ME/CFS including sensory inputs (physical sensations, over-stimulation), emotions (high emotional lability), attention span (attention what?), working memory (“please repeat that”), planning (right!), self-control (highly needed) and decision-making (agonizing). It’s the seat of executive functioning, which studies suggests is not going so well in Chronic Fatigue Syndrome.

Cognitive processes are what the prefrontal cortex is known for, but that’s not why these researchers are zeroing in on it; it also plays an important role in motor control; i.e., movement. The DLPFC connects to several parts of the brain that regulate movement including the premotor cortex, supplementary motor area, cerebellum, and basal ganglia.

Because the dorsal lateral prefrontal cortex appears to decide which process – energy enhancement or the induction of fatigue – is going to prevail, the authors hypothesize that metabolic, functional, or structural damage to this part of the brain is key to the development of fatigue in Chronic Fatigue Syndrome.

Add comment September 4th, 2014


Calendar

September 2014
M T W T F S S
« Aug   Oct »
1234567
891011121314
15161718192021
22232425262728
2930  

Posts by Month

Posts by Category